Abstract
To evaluate fatigue propertiesof rubber modified SMA asphaltmixture, based on optimizing the preparation process of rubber asphalt, the splitting fatigue testsof three kinds of asphalt mixture is carried out including ordinary asphalt, modified asphalt with rubber powder and SBS modified asphalt. And the freezing and thawing conditions were considered in the tests. The results show that rubber powder can improve the fatigue properties of SMA asphalt mixture, but the modified effect of rubber powder is not as good as SBS modifier, the fatigue properties of asphalt mixture are deteriorated by freeze-thaw conditions, the deterioration degree of rubber modified asphalt mixture is less than SBS modified asphalt mixture, but rubber modified asphalt mixture has better freeze-thaw durability.
Highlights
In order to fully evaluate the influence of rubber powder on the fatigue properties of SMA asphalt mixture, the performance comparison of three kinds of asphalt mixtures, including ordinary SMA-13 asphalt mixture, ordinary SMA-13 asphalt mixture with rubber powder and SBS modified SMA-13 asphalt mixture are carried out
The freeze-thaw circulation conditions are as follows: the specimen is put into a plastic bag after vacuum water-retention; 10 mL water is added; the specimen is put into the mouth of the bag and kept in thermostatic water tank at -18°C for 16 hours
There have been many research results on the production process of rubber modified bitumen[7,8,9], considering the compatibility between bitumen and rubber powder, this study evaluated the influence of mixing time and stirring temperature on the performance of rubber modified bitumen, to determine the production process of indoor rubber modified bitumen
Summary
In order to fully evaluate the influence of rubber powder on the fatigue properties of SMA asphalt mixture, the performance comparison of three kinds of asphalt mixtures, including ordinary SMA-13 asphalt mixture, ordinary SMA-13 asphalt mixture with rubber powder and SBS modified SMA-13 asphalt mixture are carried out. To consider the influence of freeze-thaw conditions on the fatigue properties of various asphalt mixtures, the fatigue tests were conducted after 0 (non-condition), 1, 3 and 5 freeze-thaw cycles respectively. The freeze-thaw circulation conditions are as follows: the specimen is put into a plastic bag after vacuum water-retention; 10 mL water is added; the specimen is put into the mouth of the bag and kept in thermostatic water tank at -18°C for 16 hours. The specimen is taken out, immediately put into the 60°C thermostatic water tank, removed the plastic bag, and kept warm for 24 hours
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call